<table id="ignored1" role="presentation">
  <tr>
    <th>AXE</th>
  </tr>
  <tr>
    <th>axe</th>
  </tr>
</table>

<table id="pass1">
  <tr>
    <th>AXE</th>
  </tr>
  <tr>
    <td>axe</td>
  </tr>
</table>

<table id="pass2">
  <tr>
    <th>AXE</th>
    <td>axe</td>
  </tr>
</table>

<table id="pass3">
  <tr>
    <td headers="hd1">axe</td>
    <th id="hd1">AXE</th>
  </tr>
</table>

<table id="pass4">
  <tr>
    <td aria-labelledby="hd2">axe</td>
    <th id="hd2">AXE</th>
  </tr>
</table>

<table id="pass5">
  <tr>
    <th></th>
  </tr>
</table>

<table id="pass6">
  <tr>
    <th>AXE</th>
    <th>AXE</th>
  </tr>
  <tr>
    <th>AXE</th>
    <td>axe</td>
  </tr>
</table>

<table id="pass7">
  <tr>
    <th>AXE</th>
    <td><input type="text" /></td>
  </tr>
</table>

<table id="pass8">
  <tr>
    <th>hi</th>
    <td></td>
  </tr>
  <tr>
    <th>hi</th>
    <td></td>
  </tr>
</table>

<table id="canttell1">
  <tr>
    <td>axe</td>
    <th>AXE</th>
  </tr>
</table>

<table id="canttell2">
  <tr>
    <th>AXE</th>
  </tr>
  <tr>
    <th>AXE</th>
  </tr>
</table>

<table id="canttell3">
  <tr>
    <th>AXE</th>
    <th>AXE</th>
  </tr>
</table>

<table id="canttell4">
  <tr>
    <td>axe</td>
    <td role="columnheader">AXE</td>
  </tr>
</table>
